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Windows 7: my computer is lagging bad and not sure why

ok...here's what I have figured out now. The problem is when I transfer a file from my internal drive to my external drive. When I transfer internal to internal, or external to external there is no problem. It also seems when I transfer from external to internal there is also no problem. Any ideas or suggestions for what to do next?

From what i understand, you have only one external disk. Could you borrow another one from a friend so that we can check whether it's the computer's problem or your external disk's problem? Also, don't forget to test speeds with the same disk on several USB ports.

Borrowing an external disk from someone is not an option. I have tested transfering through multiple USB ports with the same result. Could it be my USB cable? This is incredibly frustrating and am seriously considering a fresh install (or trying a repair?)

I had similar experiences when my GA P67A UD3 started having SATA controller issues. The first generation of P67 motherboards (of all brands) was notorious for this, which is why nearly all of them have been recalled and replaced with B3 versions.

my computer is lagging bad and not sure why

dwm.exe lagging the computer with 20% cpu usageCheers
This computer has been set up new about a week ago.
All drivers (including NVidia, which sits at 368.39) are brand new (downloaded from the ASUS support page... besides NVidia), according to Windows Update, there's nothing left to do (means, Win 7 is on SP1).
Nevertheless, once I...

General Discussion

Computer keeps lagging/freezing every few seconds.My problem is that my computer keep lagging every few seconds, the video (entire display, including mouse) freezes and audio buzzes.
I can go for a while without anything going wrong on my computer, but once it starts to lag, it happens for about 10 seconds on and off.
This happens almost...

Hardware & Devices

Computer lagging every few seconds??!My computer lags whenever I type, watch video or just search the web. I did a system restore not to long ago so I don't know the issue. I have a 2009 Gateway running Windows 7 64. Help is needed thanks.

Performance & Maintenance

Computer lagging?I just instaled windows 7 and i wanna play league of legends... so i got a good pc for lol low details : 1gb ram, AMD athlon(tm) 64 processor 3000+ 1.8GHz,nvidia gforce 8800 gs
... and when im playing counter strike with teamspeak 3 fps is "high-low" just falling and raising ... can somebody help...

Performance & Maintenance

Computer lagging ever since installing Windows 7Hey,
I just upgraded my computer to Windows 7 64 bit and I'm having a lot of trouble with it. One of the biggest issues I have is performance. Ever since I installed Windows 7 my computer lags so much that it's impossible to watch videos or listen to music and even type. Is this problem caused...